This site may earn affiliate commissions from the links on this page. Terms of use.

Electric planes aren't near as efficient as their automotive counterparts, but things are starting to take off. Recently, the e-genius, an electric plane developed at the University of Stuttgart, managed a two hour flight maintaining an average speed of 100 miles per hour.

The second test flight for the plane, which has been in development for several years, took place in Mindelheim, where two pilots managed to get the e-genius up to a height of 4,000 feet, before staying airborne for a little over two hours. According to the university, the plane consumed less than 56 kWh of electric energy during the flight.

The the two-seater plane will be featured in the upcoming NASA Green Flight Challenge, which begins on September 25 and features a grand prize of $1,650,000.